Nitrogen sealing device is composed of nitrogen supply device and nitrogen discharge device of two parts. Nitrogen device by the pilot and the main valve is composed of two parts; nitrogen device by the pressure feedback micro-pressure control valve components. Nitrogen pressure is generally set to 100mmH2O, precisely controlled by a nitrogen seal.
When the tank inlet valve is opened to add material to the tank, the liquid level rises, the volume of the gas phase part decreases, and the pressure rises. When the pressure in the tank rises above the set pressure of the nitrogen releasing device, the nitrogen releasing device opens, Release nitrogen to the outside world. So that the tank pressure dropped to the nitrogen pressure relief set point, nitrogen device automatically shut down.
When the tank outlet valve is opened, the user discharges, the volume of the gas phase increases, the pressure in the tank is reduced, the nitrogen supply is turned on, and nitrogen is injected into the tank to increase the pressure in the tank. When the pressure in the tank rises to the nitrogen supply Automatically shut down.
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